Refrigerating system



2 Sheets-Sheet A. JONES REFRIGERATING SYSTEM Filed Feb. 5, 1927 INVENTOR.

A TTORNE Y.

45E/e77- /0 BY( A Nov. 19, 1929.

Nov. 19, 1929. 1.1911129 1,736,706

REFRIGERATING SYSTEM Filed Feb. 5, 1927 2 sheets-sheet 2 J JNVENTQR.

fa A?? ATTORNEY.

Patented Nov. 19, 1929 ALBET JONES, OF BALTIMORE, MARYLAND, ASSIGNOR TOHIMSELF, MA'URICE K.

HEARTIFIELD, F WASHINGTON, D'ISTRI 0F BALTIMORE, MARYLAND Y CT 0F COLUMBIA, AND JAMES M. DECKER,

REFRIGERATING SYSTEM Application filed February 5, 1927. Serial No, 166,118.

This invention relates tomeans for refrigerating embodying the use of carbon dioxide ice. This substance is now being sold commercially under the name of dry ice in the form of fine flakes, in which form it is shipped from one part of the country to the other in paper containers. CNumerous attempts have been made to utilize this substance asa refrigerant, but as far as l am aware these have not been a success, except for local chilling. I propose by means hereinafter described to utilize such carbon dioX ide ice as a means for cooling refrigerators, etc., and have 1n the accompanymg drawmgs shown this invention applied to a cooling of an ice-cream cabinet.

Referring to the accompanying drawings in which corresponding parts are designated bycorresponding marks of reference,-

Figure l is a longitudinal vertical section through an ice-cream cabinet containing my invention. y

Figure. 2 is a horizontal section thereof` on the line 2-2 of the Figure l.

Figure 3 is a vertical transverse section on line 3-3 of Figures l and 2.

Figure 4 is a detailed sectional view of a portion of Figure 3.

-The cabinet A may be of any approved construction. As shown it embodies the heat insulating packing B around a central well in which may be placed cans C containing the ice-cream. A suitable movable cover D having holes therein for the reception of the cans being provided for the cabinet.

As shown, a vessel E, hereinafter called the dry ice container, is located intermediate of the length of the cabinet, and in the upper part thereof, this being inserted through a. proper hole. in the top D. The vessel E is by preference made of light sheet metal and is of oblong shape, and While tightly sealed, preferably after the dry ice has been placed therein, is not of sull'i'cient strength to stand any greatpressure from within. This prevents damage by an explosion of the vessel in case the'internal pressure therein is built up by too rapid vaporization of the dry ice. Projecting downwardlyl from the bottom of the vessel E near its end is an extension F best shown in Figure 4. Each extension conf sists of a circular wall f united at its upper end with the bottom wall of the vessel E, and havingits lower end connected with the bottom annular wall f', the inner edgeofwhich is in turn connected ,witlithe angular wall f3 from the inner edge of which depends the vertical cir-,j cular wall f4, the bottom of which isa'fiixed to the bottom f5. The space boundedby the walls f to f5 is in communication witlrthe interior of the vessel E, although preferably separated therefrom by a grating of netgvork G' at its upper end and on whichAthediy-ice maybe placed. It will be noted that between the Walls f and f2 there is an annular space in the interior of the extension of the vessel and that between the annular wall f2 and #there is a similar annular space exterior to the extension. l

A pipe H enters one side of the wall f at some distance above its lower edge, and has its lower end terminating in a nozzle box I in one side of which is inserted a sheetof very thin brass, through which is a minute hole J. The level of this hole is slightly below the level of the wall f', and the hole is directed across the lower end of the extension and also lengthwise of the cabinet, the holes of the two extensions being reversely placed.

In operation when the dry ice is placed in the container it slowly evaporates and the resultant gas sinks into the extension F. It

will be found that a part of this gas recongeals l on the surface of the extensions with the escape of some gas through the nozzle I. While the issuing gas is quite cold it has been found that it will not, if merely liberated in the cabinet, produce a suiliciently low temperature, but we havefurther found that if the jet is directed in the manner Idescribed across the base of the extension, a much lower temperature is produced, and the efficiency is much improved. Moreover, the jets produce a general circulation of the air within the cabinet throughout the cabinet, and to aid this the ends of the cabinet are preferably rounded.

Having thus described my invention what I claim and desire to secure by Letters Patent is :--l

1. In a refrigerating system the combination with a container for carbon dioxide ice in the upper part of said system, a closed extension space below the container in connection with the interior of the container and a nozzle connected with the extension and directing a jet of vaporized gas adjacent to the wall of the container.

2. In a refrigerating system, the combination with a container for carbon dioxide ice, of an extension below the container separated therefrom by a rest for the carbon dioxide ice and a nozzle connected with the interior of the extension and directed adja' cent to an exterior wall of the extension.

3. In a refrigerating system, the combination with a container for carbon dioxide ice in the upper part of said system, having an extension with concentric walls on the bottom thereof, anozzle connected with the said extension and directed adjacent to an exterior wall of the extension.

4. In a refrigerator, the combination with a cabinet, of a container for carbon dioxide ice located intermediate of the ends of the cabinet and having on the bottoni thereof two extensions, a nozzle connected with each extension and directed across the exterior wall of the same extension, the nozzle of the two extensions being reversely orientated.

5. In a refrigerator, the combination with the cabinet, the ends of which are rounded, of a container for carbon dioxide ice located intermediate of the ends of the cabinet and having from the bottom thereof two extensions, a nozzle connected with each extension and directed across the exterior wall of the same extension, the nozzle of the two extensions being reversely orientated.

6. In a refrigerator using carbon dioxide i ice, a container for said ice in the upper part of the refrigerator, said container being floored with a grating, an extension of said container below said grating, a conduit leading from a point above the floor of the said extension, and a nozzle issuant from said conduit at a level below the bottom of the said extension and ,opening into the interior of the refrigerator.

7 In a refrigerator for using carbon dioxide ice, a container in the upper part of said refrigerator for said ice iloored with a grating, an extension of said container below said grating, an annular pocket around the wall of the said extension, a second pocket central of the said annular pocket, a conduit leading from said central pocket at a level below the bottom of the said extension and opening into the interior of the refrigerator.

In testimony whereof I hereunto affix my signature.

' ALBERT JONES. 

